CN201430110Y - Arc extinguishing device of circuit breaker - Google Patents
Arc extinguishing device of circuit breaker Download PDFInfo
- Publication number
- CN201430110Y CN201430110Y CN2009201423826U CN200920142382U CN201430110Y CN 201430110 Y CN201430110 Y CN 201430110Y CN 2009201423826 U CN2009201423826 U CN 2009201423826U CN 200920142382 U CN200920142382 U CN 200920142382U CN 201430110 Y CN201430110 Y CN 201430110Y
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- Prior art keywords
- arc
- circuit breaker
- arc extinguishing
- contact
- control device
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses an arc extinguishing device of a circuit breaker. The circuit breaker comprises a fixed contact and a moving contact connected with an operating handle, and arc extinguishing grating plates are arranged between the fixed contact and the moving contact. The arc extinguishing device is characterized in that an insulating plastic board is arranged around the fixed contact.The arc extinguishing device is simple in structure and excellent in arc extinguishing effect and can be applied to an arc extinguishing chamber of a switching appliance.
Description
Technical field
The utility model belongs to the resist technology field of electrical equipment, has been specifically related to a kind of arc-control device of circuit breaker.
Background technology
Circuit breaker is mainly used to cut off and connect load circuit, and the disengagement failure circuit, and the accident that prevents enlarges, and guarantees safe operation.Be divided into primary cut-out by its scope of application, and low-voltage circuit breaker, the high-low pressure identification of boundaries is fuzzyyer, and is general with the High-Voltage Electrical Appliances that are called more than the 3kV.Low-voltage circuit breaker claims automatic switch again, and it is a kind of existing hand switch effect, can carry out decompression, under-voltage, overload and the electrical equipment of short-circuit protection again automatically.It can be used to distribute electric energy; do not start asynchronous motor continually; power circuit and motor etc. are carried out protection, can automatic shutdown circuit when serious overload or short circuit and fault such as under-voltage take place for their, its function is equivalent to Fuse switch and the combination of crossing underheat relay etc.And behind the disjunction fault current, generally do not need to change parts, obtained to use widely.
Primary cut-out or title high-voltage switch gear are the main electric control appliances of electric substation, have arc quenching characteristic, and when system normally moved, it can cut off and connect the zero load and the load current of circuit and various electric equipments; When system broke down, it and relaying protection cooperated, and energy is the disengagement failure electric current rapidly, to prevent expansion accident scope.Therefore, the quality of primary cut-out work directly has influence on the safe operation of electric power system; The primary cut-out kind is a lot, and the difference by its arc extinguishing can be divided into: oil circuit breaker (bulk-oil circuit-breaker, oil-minimum breaker), sulfur hexafluoride breaker (SF6 circuit breaker), vacuum circuit-breaker, compressed-air circuit breaker etc.
Device for switching relies on the incompatible control circuit of branch of switch contact.Separate the initial stage at switch contact, if the voltage that contact is seen greater than 10～20V, electric current greater than 80mA, will produce electric arc, this phenomenon becomes arc discharge.Occurring arc discharge between contact, is because gas (medium has taken place free) exists the ion of positively charged and electronegative electronics.The form of gas ionization has highfield emission, thermionic emission, heat is free and ionization by impact etc.When the switch contact open circuit, because the distance between contact is very little, the electric field strength of voltage formation therebetween is very big; In the process that contact separates, contact pressure between dynamic/static contact and contact area constantly descend and reduce, and contact resistance is increased rapidly, cause the temperature of contact position to raise.Under highfield and action of high temperature, form strong electric field emission and thermionic emission, charging point collides with gas atom in motion process, makes acute liter of temperature of contact position, and the form that electric current forms electric arc continues mobile between the contact that has separated.
Arc-suppressing method commonly used comprises that cooling arc extinguishing method, speed draws arc extinguishing method, short arc arc extinguishing method, slit arc extinguishing method and gas blast arc-quenching method.The method that electric arc is extinguished by the method that reduces arc temperature rapidly is cooling arc extinguishing method.Quicken to cut off the action of circuit, the electric field strength between contact is weakened rapidly, the method that electric arc is extinguished rapidly is that speed is drawn the arc extinguishing method.Slit arc extinguishing method mainly is to utilize the narrow ditch arc extinguishing of slit, electric arc is contacted, with arc extinction with solid dielectric.And the gas blast arc-quenching method is to utilize the air-flow of colder dielectric to blow the compound and diffusion that electric arc elongates electric arc reinforcement charged particle, simultaneously the charged particle in the arc gap is dispelled, and recovers the dielectric strength of medium rapidly.Adopting more is short arc arc extinguishing method.
Short arc arc extinguishing method principle such as Fig. 1 are equipped with arc extinguishing grid pieces 3 in the device for switching, the grid sheet is to be made by ferromagnetic material, preferably have breach on the grid sheet, are in order to reduce the resistance that electric arc 4 enters the grid sheet, can to shorten the arcing time.After electric arc took place for 1,2 of dynamic and static contacts, the interaction force that produces between magnetic field that produces by arc current and ferromagnetic material was attracted to electric arc in the grid sheet, and long arc is divided into a string short arc.Behind current over-zero, the initial medium intensity of 150～200V all can appear in the cathode zone of each short arc immediately, if the initial medium intensity summation of all negative electrodes during greater than the voltage between contact, because of burning that can not pilot arc, electric arc will extinguish.Yet better improve arc quenching effect and do not find as yet that in the prior art the present invention comes therefrom.
Summary of the invention
The utility model purpose is to provide a kind of arc-control device of circuit breaker, has solved in the prior art problems such as the Arc Distinguishing Device for Circuit Breakers arc quenching effect is not good.
In order to solve these problems of the prior art, the technical scheme that the utility model provides is as follows:
A kind of arc-control device of circuit breaker, described circuit breaker comprise fixed contact and the moving contact that is connected with operating grip, are provided with arc extinguishing grid pieces between described fixed contact and moving contact, it is characterized in that around the described fixed contact ambroin plate being set.
Preferably, contact by point between described moving contact and fixed contact or line contact or face contact.
Preferably, described arc extinguishing grid pieces is U type grid sheets.
Preferably, described arc extinguishing grid pieces is irony grid sheets.
Preferably, described arc extinguishing grid pieces one end is provided with and pulls out the wind and smoke road.
Preferably, described pull out the wind and smoke road be arranged on arc extinguishing grid pieces one side and with arc extinguishing grid pieces fixing pull out the wind and smoke road, described pulling out on antetheca that the wind and smoke road combines with arc extinguishing grid pieces and the rear wall is provided with several airing holes.
Preferably, describedly pull out airing hole on the wind passage antetheca and the airing hole mutual dislocation on the rear wall forms lost.
The utility model advantage is:
In the technical solution of the present invention on the basis of prior art short arc arc quenching principle, by laying one deck thin insulating plastic plate around the fixed contact that is preferably breaker of plastic casing at circuit breaker, can discharge a kind of gas of the electric arc that suffocates under this kind plastic plate arc light that electric arc produces when the contact arcing, high temperature, the hot irradiation, the a large amount of simultaneously heats that absorb electric arc of this kind gas release process, impel electric arc constantly to lower the temperature, accelerate arc extinction, improve the effect of arc extinguishing greatly.
2, pull out the wind and smoke road by of forming with high-temperature insulation material is housed in the arc extinguishing grid pieces back in the preferred technical solution of the present invention, have a series of airing holes before and after the wind and smoke road on the wall and accelerate the flue gas that electric arcs produce and remove by pulling out.More preferably, the perforate that the present invention pulls out on the wind and smoke road front and rear wall is dislocation each other, misalignment, formed a series of lost, make under the arcing the huge arc light that comes and metal particle, the plastic particles etc. of spilling pass left that part of can all being blocked in the flue of arc control device and must not leak, and allow all the other flue gases under the effect of pulling out wind-force of flue, accelerate to excrete, accelerate to reduce the temperature of arc control device.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the principle assumption diagram of short arc arc extinguishing in the prior art;
Fig. 2 is the structural representation of the arc-control device of circuit breaker in the embodiment of the invention;
Fig. 3 is the front view of Fig. 2;
Fig. 4 is the vertical view of Fig. 2;
Fig. 5 is the left view of Fig. 2.
Wherein: 1 is that fixed contact, 2 is moving contact, and 3 is arc extinguishing grid pieces, and 4 is electric arc; 5 for plastic insulation plate, 6 for pulling out the wind and smoke road, 7 is airing hole, 8 is arc chamber.
Embodiment
For the technical scheme of more detailed statement foregoing invention, the following inventor lists specific embodiment and comes bright technique effect; It is emphasized that these embodiment are used to the present invention is described and are not limited to limit the scope of the invention.
Embodiment is as figure, and the arc-control device of this circuit breaker, described circuit breaker comprise fixed contact 1 and the moving contact 2 that is connected with operating grip, are provided with arc extinguishing grid pieces 3 between described fixed contact and moving contact, and ambroin plate 5 is set around the described fixed contact.Contact by face between described moving contact and fixed contact.
Arc extinguishing grid pieces is a U sections matter grid sheet 3, and described arc extinguishing grid pieces one end is provided with and pulls out wind and smoke road 6.Described pull out the wind and smoke road be arranged on arc extinguishing grid pieces one side and with arc extinguishing grid pieces fixing pull out the wind and smoke road, described pulling out on antetheca that the wind and smoke road combines with arc extinguishing grid pieces and the rear wall is provided with several airing holes 7.Describedly pull out airing hole on the wind passage antetheca and the airing hole mutual dislocation on the rear wall forms lost.
Arc chamber 8 is than common design lengthening 1/3rd in the present embodiment, and how corresponding arc extinguishing grid pieces has also increased by 1/3rd, increases the effect of arc extinguishing.
Above-mentioned example only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalent transformations that spirit is done according to the present invention or modification all should be encompassed within protection scope of the present invention.
Claims (8)
1. the arc-control device of a circuit breaker, described circuit breaker comprises fixed contact and the moving contact that is connected with operating grip, is provided with arc extinguishing grid pieces between described fixed contact and moving contact, it is characterized in that around the described fixed contact ambroin plate being set.
2, the arc-control device of circuit breaker according to claim 1 is characterized in that between described moving contact and fixed contact contact by point or line contact or face contact.
3, the arc-control device of circuit breaker according to claim 1 is characterized in that described arc extinguishing grid pieces is U type grid sheets.
4, the arc-control device of circuit breaker according to claim 1 is characterized in that described arc extinguishing grid pieces is irony grid sheets.
5, the arc-control device of circuit breaker according to claim 1 is characterized in that described arc extinguishing grid pieces one end is provided with to pull out the wind and smoke road.
6, the arc-control device of circuit breaker according to claim 5, it is characterized in that described pull out the wind and smoke road be arranged on arc extinguishing grid pieces one side and with arc extinguishing grid pieces fixing pull out the wind and smoke road, described pulling out on antetheca that the wind and smoke road combines with arc extinguishing grid pieces and the rear wall is provided with several airing holes.
7, the arc-control device of circuit breaker according to claim 6 is characterized in that described airing hole on the wind passage antetheca and the airing hole mutual dislocation on the rear wall of pulling out.
8, the arc-control device of circuit breaker according to claim 1 is characterized in that described circuit breaker is selected from mold cased circuit breaker and omnipotent breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201423826U CN201430110Y (en) | 2009-04-09 | 2009-04-09 | Arc extinguishing device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201423826U CN201430110Y (en) | 2009-04-09 | 2009-04-09 | Arc extinguishing device of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201430110Y true CN201430110Y (en) | 2010-03-24 |
Family
ID=42033852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201423826U Expired - Fee Related CN201430110Y (en) | 2009-04-09 | 2009-04-09 | Arc extinguishing device of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201430110Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105917430A (en) * | 2013-11-15 | 2016-08-31 | 伊顿公司 | Arc baffling device |
-
2009
- 2009-04-09 CN CN2009201423826U patent/CN201430110Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105917430A (en) * | 2013-11-15 | 2016-08-31 | 伊顿公司 | Arc baffling device |
| CN105917430B (en) * | 2013-11-15 | 2018-04-10 | 伊顿公司 | Arc blocking device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20150409 |
|
| EXPY | Termination of patent right or utility model |